dividing a SNMP value by 10

[kirigoe]

hi,

I'm creating graphs for a Powerware UPS and it's working great. One of the graphs is displaying voltages, input and output voltages is fine, but for some reason, the battery voltage is ten times the actual value (2640 instead of 264). Is there a simple way of dividing this number by 10 to better align it with the other voltages?

My best guess so far is to create a custom script to retrieve the value and divide it using perl or php, but that seems like a lot of work for such little effect.

thanks in advance,
Daniel

[Hip]

Hi,

The better way to do it is to use a CDEF:

1- Create a CDEF, enter string: "a,10,/" (this is in RPN notation, see rrdtool manual)
2- Apply the CDEF on the graph item representing the battery voltage

[kirigoe]

thank you! I'll try that.

[Discogalaxy]

THX

that worked for me also.

but can someone tell me hwo to get a worth like 32,1 ? now it rounds

[BSOD2600]

In your graph template for a data source, tell it to show exact values. Also, be aware that rrdtool consolidates data.

[Discogalaxy]

after switching to "normal" all works fine
(exact numbers juts showed me rounded)

[gandalf]

Hi,

The better way to do it is to use a CDEF:

1- Create a CDEF, enter string: "a,10,/" (this is in RPN notation, see rrdtool manual)
2- Apply the CDEF on the graph item representing the battery voltage

Late, but ...
CDEF should better look like

Code: Select all

CDEF=CURRENT_DATA_SOURCE,10,/

Reinhard